A novel hyperbranched polyethyleneimine–graphene composite as shale inhibitor for drilling fluid

Abstract

Structure of a hyperbranched polymer and graphene composite used as a shale inhibitor.

Recent advances in the applications of graphene materials for the oil and gas industry

“…Zhao et al synthesized hyperbranched polyethyleneimine/graphene composite (HPEI-G) as a shale inhibitor. 1 As shown in Fig. 3, HPEI-G has a better effect of inhibiting hydration at lower concentrations.…”

“…The nanoscale size and flexible film structure of graphene-based materials allow them to plug nanopores and prevent water intrusion into clay minerals during the drilling process. 1 Their two-dimensional structure, which slides easily between layers, allows they to be used as a drilling fluid lubricant. 2 Their adsorption properties allow they to improve filtration performance in oily wastewater treatment.…”

An experimental investigation into the rheological behavior and filtration loss properties of water-based drilling fluid enhanced with a polyethyleneimine-grafted graphene oxide nanocomposite

“…13,14 To overcome these limitations, nanoparticles such as silica and graphene oxide (GO) were grafted with PEI to improve their properties. 15–17…”

“…However, this study is limited to a single concentration and a lower aging temperature of 65 °C. A recent study by Zhao et al 17 explored different PEI-GO and montmorillonite concentrations, along with elevated aging temperatures up to 150 °C, regarding rheology and American Petroleum Institute (API) filtration loss. The results indicated that the montmorillonite solution with PEI-GO had lower plastic viscosity (PV) and exhibited the lowest yield point (YP), compared to most inhibitors except potassium chloride (KCl) which signified improved rheological behavior.…”

“…13,14 To overcome these limitations, nanoparticles such as silica and graphene oxide (GO) were graed with PEI to improve their properties. [15][16][17] In recent years, the application of polymer nanocomposite (PNC) in drilling uid has been investigated to improve rheological properties, lter loss control and shale inhibition. 18,19 PNC encompasses inorganic nanoparticles that are either graed with polymer chains on their surface or are integrated within a polymer matrix.…”